The CritterTrail Fun-nel Loop-D-Loop is a great way to expand your pet's living space and to create the ultimate habitat. These connectable Loop-D-Loops can be attached to other Loop-D-Loops to create circles of fun and a 360 degree view. Loop-D-Loop can also attach to other CritterTrail Fun-nel Tubes or connectable accessories. Loop-D-Loop is easy to clean, simply unscrew the center twist bolt and pull apart the halves for trouble-free cleaning. Loop-D-Loops are available in a variety of colors so you can create a unique habitat system designed just for your pet. If you can imagine it, you can build it with CritterTrail.